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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 763 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A price comes down by 50% and then comes down by 5% more. By what percent has it come down in all? =
  2. 2.A shop sells 4480 cups of tea a month. Next month it sells 5% more. How many cups does it sell next month?
  3. 3.A price goes up by 20% and then goes up by 25% more. By what percent has it gone up in all? =
  4. 4.A water tank holds 4960 litres. 10% of the water is used. How many litres are left?
  5. 5.A town has 4520 people. Its population grows by 5%. How many people live there now?
  6. 6.The price of a school bag changes from ₹320 to ₹160. By what percent did it come down?
  7. 7.A town has 3640 people. Its population grows by 40%. How many people live there now?
  8. 8.The price of a school bag changes from ₹4080 to ₹2856. By what percent did it come down?
  9. 9.The price of a school bag changes from ₹1820 to ₹1729. By what percent did it come down?
  10. 10.The price of a school bag changes from ₹4080 to ₹3060. By what percent did it come down?
  11. 11.The price of a school bag changes from ₹860 to ₹989. By what percent did it go up?
  12. 12.A price goes up by 25% and then comes down by 15%. By what percent has it gone up in all? =
  13. 13.A town has 2820 people. Its population grows by 50%. How many people live there now?
  14. 14.A water tank holds 3520 litres. 10% of the water is used. How many litres are left?
  15. 15.A price comes down by 40% and then comes down by 50% more. By what percent has it come down in all? =
  16. 16.A shop sells 1740 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  17. 17.A water tank holds 960 litres. 25% of the water is used. How many litres are left?
  18. 18.A price comes down by 5% and then comes down by 5% more. By what percent has it come down in all? =
  19. 19.The price of a bicycle is ₹160. It goes up by 25%. What is the new price (in ₹)?
  20. 20.A water tank holds 2420 litres. 20% of the water is used. How many litres are left?
  21. 21.A water tank holds 3960 litres. 10% of the water is used. How many litres are left?
  22. 22.A water tank holds 560 litres. 20% of the water is used. How many litres are left?
  23. 23.A water tank holds 400 litres. 30% of the water is used. How many litres are left?
  24. 24.A water tank holds 1460 litres. 15% of the water is used. How many litres are left?
  25. 25.The price of a school bag changes from ₹4940 to ₹2470. By what percent did it come down?
  26. 26.A water tank holds 4660 litres. 25% of the water is used. How many litres are left?
  27. 27.A price goes up by 25% and then goes up by 20% more. By what percent has it gone up in all? =
  28. 28.The price of a school bag changes from ₹340 to ₹306. By what percent did it come down?
  29. 29.A shop sells 1360 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  30. 30.A shop sells 3540 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  31. 31.The price of a school bag changes from ₹3880 to ₹4074. By what percent did it go up?
  32. 32.The price of a school bag changes from ₹2000 to ₹2400. By what percent did it go up?
  33. 33.A town has 2200 people. Its population grows by 50%. How many people live there now?
  34. 34.A water tank holds 1940 litres. 20% of the water is used. How many litres are left?
  35. 35.A water tank holds 60 litres. 50% of the water is used. How many litres are left?
  36. 36.A town has 540 people. Its population grows by 30%. How many people live there now?
  37. 37.A water tank holds 4680 litres. 10% of the water is used. How many litres are left?
  38. 38.The price of a school bag changes from ₹2840 to ₹3692. By what percent did it go up?
  39. 39.The price of a school bag changes from ₹3960 to ₹4752. By what percent did it go up?
  40. 40.A water tank holds 3560 litres. 20% of the water is used. How many litres are left?

Answer key

  1. 52.5
  2. 4704
  3. 50
  4. 4464
  5. 4746
  6. 50
  7. 5096
  8. 30
  9. 5
  10. 25
  11. 15
  12. 6.25
  13. 4230
  14. 3168
  15. 70
  16. 2262
  17. 720
  18. 9.75
  19. 200
  20. 1936
  21. 3564
  22. 448
  23. 280
  24. 1241
  25. 50
  26. 3495
  27. 50
  28. 10
  29. 1904
  30. 4956
  31. 5
  32. 20
  33. 3300
  34. 1552
  35. 30
  36. 702
  37. 4212
  38. 30
  39. 20
  40. 2848

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